Typewriting machine



Nov. 19, 1929.

W. O. MICHELSEN TYPEWRITING MACHINE Filed oct. 22, 1927 z sheets-sheetmum l lll/iii' www Nov. 19,1929.

W. O. MICHELSEN TYPEWRITING MACHINE Filed Oct. 22, 1927 2v Sheets-Sheet2 WILL O. MIC'EELSEN, OF WOODHAVEN, i

'WRITER COMPANY, INC., OF NEW Y0 YORK, ASSIGNOR TO ROYAL TYPE- t n. r.,.a consorten or NEW rena rrrnwnrrme mamma Application med Uctober 22,19a?. Serial No. 837,997..

selecting the desired type of each group and the platen is shifted inthe usual or any desired manner in order to bring it into a position tocooperate with the selected group of types. y

The sliding type bars are actuated by a toggle mechanism which reaches astraight linel position at the time of printing so that the actualprinting is performed by pressure rather than by impact. Means areprovided for obtaining a relative adjustment between the normal positionof the platen and the type bars in order that the force of the imprintmay be varied as may be desired for manifolding.

One of each pair of keys merely gives the type bar its sliding movement,while the other key not only gives the type bar the same slidingmovement, but gives a slight lifting movement to a guide member whichsupports the type bar in its travel to the printing point, therebylifting the bar into position so that another type of the group isbrought to the printing point. The type bar is given its slidingl andilifting movements Aat substantially the same time but the liftingmovement is completed before the type bar reaches the `printing pointand the connections between the second key lever and the guide whichlifts the type bar are such that the key lever may be moved a slightfurther distance after the guide has reached the full extent of itsmove-Y ment.

The invention also comprises power operated mechanism for actuating thetype bars by which either or both of the above-described movements aregiven to the operated type bar.

action with parts in fore and aft section with the parts inl normalposition.

Figure 42 is a similar. view showing the parts in operated position whenthe type bar is actuated to print from the lowermost' type of a group. l

Figures 3 and 4 are side elevations of a portion of the power drivenmechanism showing different stages in the operation thereof. f

t. Figure 5 is a side elevation of a modificaion.

Figure 6 is a top plan view of a portionl of i the structure shown inFigure 5.

rllhe invention may be embodied in typewriting machines of widelydierent character in other respects, and for this reason the otherinstrumentalities of the typewriting machine have not been illustrated.'There is indicated a platen A which is movable to a second positionindicated in dotted lines by any usual or desired form of case shiftmechamsm.

Each type bar 1 is mounted to slide and is preferably made in skeletonform for the sake of lightness and is provided with four types w, b, o,and d. Whenthe platen isin 'Illv its lower osition as shown in Figure l,operation of t e type bar will print from one of the type c or d. lf thetype bar is given merely its longitudinal movement, the printin impresswlll be from the type c as indicate in Figure 1 while if the t pe bar issimultaneously lifted by the epression of the other keyl which o cratesthe same, the imprint will be fromt e type d as shown in Figure 2,. lfit is desired to print from types a or Z), the platen is shifted to thedotted line position and the two key levers control the selections ofthe types a or in similar manner.

Each type bar l slides 'on a supporting and guiding member 2 which ispivoted at 3 to a xed part of the machine and has u standing ears dwhich bear against one si e of a type bar and guide it. in itsmovement.. Riveted or otherwise fastened 'to the member 2 at 5 is aplate 6 which extends 'upwardly and has bent over ears en aging theupper edge of thel type bar. T e projections t, plate 6, and ears 'i'engage the type bar at lOU different points along its length and serveto 'guide the same accurately to the printing oint.

v Attachedto an intermediate portion of the type bar at 8 is a link 9which is illustrated asl being formed with two parallel membersconnectedby web portions 10.` This is'pimarily for convenience inmanufacture and to add.v stability to the parts and is preferable sinceone 'of the guide members passes on each side of the type bar and servesto guide the rear end thereof in its movement. It is possible, however,to omit the web portions 10 and employ two separate parallel links,or asingle link member may be used.

Pivoted at 11 to the link 10 is a short link 12 which, together with thelink 10, forms a toggle member. This link 12 is pivoted at its other endto a supporting member 14 mounted in the frame of the machine. Anextension 15 from the. member 14 passes through a bar 16 carried by themachine i frame and a screw 17 threaded into the bar 16 has a head 18engaging the cut-out 19 in the member 15 so that the position of themember 15 may be adjusted by turning the screw 17. A set screw 20 may beemployed to lock the member 15 in adjusted position. It is obvious thatan adjustment of this member 14 will adjust the position of thelink 12which iorms one member of the toggle and will, therefore, vary ltheedective printing position of the type bar( l l Pivoted at 21 to an earon the link 12 is a link 22 which is pivoted at its other end at 23 to alever including a pair or arms24, one arm ott' which passes on each sideof the member 15. This lever is pivoted to the member 14 at 25 and oneof -the arms is extended downwardly as indicated at 26.l A spring 27vconnected at one end to the member 14 and at its other end to an ear 28carried by themember 26 tends to hold the parts thus far de scribed inthe Figure 1 position.

The lower end ot the extension 26 is piv@ oted at 29 'to a link 36havingian arm connected by a spring 61 to an ear on the enten-e sion 26.lhe lower end of the link 36 is pivoted at 32 to a rock arm or member 35loosely mounted on a shaft 33 which is kept in con: etant rotation 'byyany suite-.ble source o'r ratchet wheel 34 is least on said.

shaft and rotates therewith. A detent mem ber is nivoted at 36 to therock arm or member 35 and has a tooth 39 adapted to he brought intoengagement with the ratchet wheel 34. fr ilorlred erm 37 loosely mountedon the shaft 33 and adjustable in its position'a has a guard 38' whichoverlies the ratchet wheel ttor a purpose hereinafter set forth.

ley levers 40 and 41 are pivoted on a suitable anis and are adapted toconnect the action proper to the power driving mechanism in the'.i'ollovving manner. The key lever 40 is connected by a link 42 to alever 48 pivoted on an axis 46 and having a bent over ear 44 whichoverlies an arm 45 also pivoted on the axis 46. The key lever 41 isconnected by a link 50 with a short lever 51 pivoted on the axis 46 andlying on the other side of thel lever 45 and has an ear 52 overlying thesame.r The arm 45 has an extension 48 to which is' 51 has an upwardproject on 53 'for la purpose hereinafter set forth and the lever 45 hasa broadened end 54 adapted when the parts are in normal position to liein front of an ear 55 on the upper end of the rock arm or memberZ55/'and alsofto. overlie a portion '56 of the detent or pawl memberpivoted at 36.

The arm 53 is connected by a link 57 toa latch/member 58 having a slot59 adapted to engage a pin 60 carried by the ear 28 on the leverextension 26. This latch member` is connected by a lost motion pin andkslot connection 61 with the rear end of the lifting and guiding member2. A spring 62 connected to 'the latch 58and to the member 2 tendstoretain the parts in the Figure 1 position.

A spring' 63 connected at one end to the member, 2, and at its other endto a frame member 49 'tends to hold the member 2 in the Figure 1position in which a stop member 65 contacts with the frame member 64.When the member 2 is shifted to bring the lower type of each group totheprinting position as is shown in Figure 2, a stop 6fo carried by themember 2 engages the under side ci a porn tion ci they trame member 64to limit the lifting movement oi the type bar. i

lt the parts arenin the Figure 1 position, and the key lever 40 isdepressed, this will through the link 42 pull down on the lever 45, theendof which is in engagement'vviththe portion 56 of the detent membercarried by the mem.

ber 35 and will swing this detent member until the tooth 89 thereoi3engages the constantlyv rotating ratchet wheel illiie position ol 'theparts at this momei'it is substantially that nov shown in Jligure 3. Therotation the 7 ratchet wheel 34 with the shalt 33 will now move thedetent and the arm 35 "which carw ries the same to the Figure 4position, thus swinging the link 36 and moving the whole train orconnections to the type bar to move the same towards printing position.J ust alter the detent passes the Figure position, it comes in Contactwith the guard 36 and is thrown out ont enge-.gement with 'theratchetWheel to the Figure 2 position7 which position it reaches just as theprinting takes place. The spring 31 will thereupon return the type ctionand all connected parts substantially to the l-Tigure l positionregardless or whether the pressure on the hey lever is released or not.If the key lever is'held down,` the arm 45 will be held in depressedposition and the .-.detent member will contact with the arm as v shownin the dotted line position of Figure 2. The broad end 54 of the arm 45will prevent this detent member from movingabove the arm 45 and as soonas the key lever is allowed to return to its normal position, the partswill then reach the Figure 1 position, the ear 55 of the member 35contacting with the broad end 54 of the lever 45 and preventingoverthrow of the parts.

If the key lever 41 is depressed, the action above described will' takeplace. In addi'v from either lkey lever without interfering with theother.

The member 37 which carries Athe guard 38 can be adjusted in its normalposition by means of' a slot 67 in said member engaging a pin 69 carriedby a rotatable part 68 but eccentric thereof. As, shown in Figure 4, therotation of the member 68 will vary the normal position of the part 37and guard 38 and, therefore, vary the point at which the detent wil bethrown out of engagement with the ratchet wheel 34. l

In the modified form shown in Figures 5 andv 6, the lever 43 is omittedand the link 42 is connected directly to the arm 45, which is providedwith a returning spring 70. The key le'ver 41 is connected by the link50 to the lever 51 exactly as in the first form, but in this case thelever 51 is provided with a separate returning spring 7l. Thekey lever40 is also provided with an individual returning spring 7 2. Carried byan ear 73 on the lever 51 is an eccentric 74 which overlies the.

arm 45 and the position of which may be adjusted by rotating.- Suitablelo'ck nuts are provided for holding this in adjusted position.

In this modification a depression of the key lever 40: will move thelever 45 directly and will tension the two springs 70 and 72. .Adepression of the key lever'41 will move the lever 51 and through theoverlying eccentric 74, the lever 45, thus tensioning the twoV springs70 and 71. The key lever 41 of each group needs no return spring ofits-own. In

the case of both levers two returning springs e are tensionedr so thatthe touch may be ma uniform. l

The supportin and uiding member`2 is normally incline slight y below thehorizonprinting position, it moves to 'an equal distance above thehorizontal. This results in the same action in both positions of thetype bar. The provision of separate adjusting means for each type barallows the printing position thereof to be varied individually. y

tal and when lifted to bring the type d into Any old and common meansfor adjustingA the i position of the platen relative to the type ars mayalso be employed if desired.

It is obvious that portions of the invention are applicable to theconstruction in which the key levers are actuated manually to transmitmovement to the type action. It-

is also obvious that other forms .of power actuating mechanism mi ht beemployed in connection with the speci c type action illustrated. Variousmodificationsmay be made in the detail construction andv the arrangementof parts and in general it is to be understood that the inventionis tobe regarded as limited only by the scope of the appended claims.

I claim as my invention: n

i 1. A type action comprising alslidable type bar provided with aplurality of groups of type, key levers associated with the type bar andcorresponding in number to the number of type lin each group, a movablesupport for the type bar, ower operated means controlled by theepression of eachkey lever for sliding the type bar to the printingposition including a lever, a latch carried by the movable support, andmeans operated by the depression of one key lever for connecting'the-latch to the power operated lever.

2. A type action comprising a slidable type bar provided with aplurality of groups of type, key levers associated with the type bar andcorresponding-in number to the number of type'in each group, a pivotedsupport for the type bar, power operated means con-y trolled by the deression of each key lever for sliding t e type ar to the printingposition, means operated by the depression of one key lever forconnecting the pivoted support to the power operated means, and meanspermitting the power operated means for sliding the tpe bar tooperateafter the pivoted support as reached the limit of its movement.

3. A type action comprising a slidable type bar provided with aplurality of groups of type, key levers associated with the type bar andcorresponding in number to the number of type in each group, a pivotedsupportfor the type bar, power operated means controlled by thedepression of each key lever for sliding the type bar to the printingposition, a latch carried by the ivotedsupport, means for moving saidlatcli into operative engagement with the power operated means, andmeans for operating said moving means by the ldepression of one of thekey levers.

4. A type action comprising a slidable type bar provided with aplurality of groups of moving means by the depression ofone of the keylevers, Ythe loose' engagement of the latch permitting the means forsliding the type bar to operate after the pivoted .support has reachedthe limit of its movement.

.5. Power driving means for type bar actions comprising a constantlyrotating shaft,l

a ratchet wheel thereon, an arm loosely mounted on said shaft, a detentpivoted on said arm, means for moving said detent into engagement withthe ratchet wheel so that the arm will rotate with the shaft, meanswhereby the movement of the arm will actuate,the type bar action, meansincluding a plurality of key levers for independently operating the saiddetent moving means, means supporting the type bar for movement inanother direction, and-means operated by one of said key levers forconnecting the supporting means to the power driving means.

6. yPower driving means for type bar actions comprising a constantlyrotating shaft, a ratchet wheel thereon, an arm loosely mounted on saidshaft, a detent on said arm, key'operated means for moving said detentinto engagement with the ratchet so that the arm will rotate with theshaft, means whereby the movement of the arm will actuate the type baraction,'a guard for the ratchet wheel loosely mounted on the shaft forcooperation with the detent to disengage the latter from the ratchetwheel, and means for circumerefntially adjusting the guard about the shat.

7. Power driving means for type bar actions comprising a constantlyrotating shaft, a ratchet wheel thereon, an arm loosely mounted on saidshaft, a detent on said arm', key operated means for moving said detentinto engagement with the ratchet so that the arm will rotate with theshaft, means whereby the movement of the arm will actuate the type baraction, a guard for the ratchet wheel loosely mounted on the shaft forcooperation with the detent to disengage the latter from the ratchetwheel, said guard being provided with a slotted arm, and means includingan adjustable eccentric engageable with the slotted arm of the guard tocircumferentially adjust the latter about the shaft.

8. A type action comprising a slidable type bar provided with two groupsof type, two key levers associated with the type bar, a verticallymovable support for the type bar,

` latter out o a power mechanism for the Atype action including aconstantly rotating shaft, a member loosely mounted on the shaft, adetent pivotally mounted on the member for engagement with the ratchetwheel, connections between the member and the type bar for moving thelatter along the support upon engagement of the detent with the ratchetWheel, an arm pivoted on a fixed axis for moving the detent intoengagement with the ratchet wheel, a pair of levers independentlyengageable with the pivoted arm, separate connections between the leversand the key levers whereby upon depression of either key lever the armwill be Vmoved to engage the' detent with the ratchet wheel, and meansconnected with one of the pivoted levers for moving the typebar supportvertically upon depression of one key lever only.

9. A type action comprising a slidable type bar provided with two groupsof type, two key levers associated with the type bar, a verticallymovable support for the type bar, a power mechanism for the type actionincluding a constantly rotating shaft, a member loosely mounted on theshaft, a detent pivotally mounted on the member for engagement with theratchet` wheel, connections between the member and the type bar formoving the latter along the support upon engagement of the detent withthe ratchet wheel, an arm pivoted on a fixed axis for moving the detentinto engagement with the ratchet wheel, a pair of levers independentlyengageable with the pivoted arm and ulcrumed on the same axis, a springfor normally holding said pivoted arm out of engagement with the detentand in engagement with :the levers, separate connections between thelevers and the key levers whereby upon depression of either key leverthe arm will be moved to engage the detent with the ratchet wheel, andmeans connected with one of the pivoted levers for moving the type barsupport vertically upon depression of one key lever only.

10. Power driving means for type bar actions comprising a constantlyrotating shaft, a ratchet wheel ixed thereon, an arm loosely mounted onsaid shaft, a detent pivoted on said arm and movable to either of twoextreme positions, a stop to limit the movement of the detent in itsinoperative position, a coil spring connected at its ends to the arm andto the detent respectively whereby the spring will :function toyieldably retain the detent in either extreme position, said detentbeing normally held in its inoperative position by said spring, keyoperated means for moving said detent into engagement with the ratchet tso that the arm will rotate with the shaft, and a stationary guard forthe ratchet wheel which is enfgaged by the detent to throw theengagement with the wheel ajfter a predetermined movement thereof.

11. A type action comprising a slidable type bar rovided with aplurality of groups A 'sliding the type bar to the printing position, Aand means operated by the depression of one key lever for connecting themovable sup port to the power operated means to be operated thereby.

12. A type action comprising av slidable type bar provided with aplurality of groups of type, key levers associated with the type bar andcorresponding in number to the number of type in each group, a movablesupport for the type bar, power operated means controlled by thedepression of each key lever for slidingthe type bar to the printingposition including a lever, and means operated by the depression of onekey lever for connecting the movable support to the power operatedlever.

13. A type vaction comprising a. slidable type bar rovided with aplurality of groups of type, ey levers associated with the type bar andcorresponding in number to the number of type in each group, a pivotedsupport for the type bar, power operated means controlled bv thedepression of each key lever for sliding the type bar tothe printingposition,

' means operated by the depression of one key lever for connectin thepivoted support to the power operate means, and means for limiting thepivotal movement of the support.

14. A type action comprisinga type bar mounted for sliding and tiltingmovement, means forv giving the type bar its sliding movement comprisinga' lever, ower operating means, a plurality of keys or connecting I saldpower operating means to said lever,

' means for giving the type bar its tilting movement, and means operatedby one of said key levers for connecting this means to said lever.

In testimony whereof, I have hereunto subscribed my name.

WILLIAM O. MICHELSEN.

